The Enantioselective Synthesis of Eburnamonine, Eucophylline, and 16′‐
<i>epi</i>
‐Leucophyllidine
作者:Christopher E. Reimann、Aurapat Ngamnithiporn、Kohei Hayashida、Daisuke Saito、Katerina M. Korch、Brian M. Stoltz
DOI:10.1002/anie.202106184
日期:2021.8.9
hemispheres. The eburnamonine-derived fragment was synthesized through a Bischler–Napieralski/hydrogenation approach, while the eucophylline-derived fragment was synthesized by Friedländer quinoline synthesis and two sequential C−H functionalization steps. A convergent Stille coupling and phenol-directed hydrogenation united the two monomeric fragments to afford 16′-epi-leucophyllidine in 21 steps from
本文公开了异二聚双吲哚生物碱无色翠啶的合成方法。通过钯催化的不对称烯丙基烷基化合成的对映体富集的内酰胺结构单元,作为两个半球的前体。依苯那莫宁衍生的片段是通过 Bischler-Napieralski/氢化方法合成的,而绿茶碱衍生的片段是通过 Friedländer 喹啉合成和两个连续的 C−H 官能化步骤合成的。收敛的 Stille 偶联和苯酚定向氢化将两个单体片段结合起来,通过 21 个步骤从商业材料中得到 16'-表-无色翠啶。